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Published on: August 25, 2018
Method for Quantifying Variation in the Resistance of Electronic Cigarette Coils
Qutaiba M Saleh1, Edward C Hensel2, Risa J Robinson2
1Department of Computer Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA.
Accurate coil resistance measurement in electronic nicotine delivery systems (ENDS) is crucial. A new four-wire method minimizes bias, unlike the two-wire approach, ensuring reliable data for ENDS research and product comparison.
Area of Science:
- Materials Science
- Analytical Chemistry
- Public Health
Background:
- Coil resistance in electronic nicotine delivery systems (ENDS) significantly influences vapor generation.
- Accurate and comparable coil resistance measurements are essential for understanding ENDS emissions.
- Existing measurement methods may introduce bias, affecting data reliability across studies and laboratories.
Purpose of the Study:
- To propose and validate a robust, accurate, and unbiased method for measuring ENDS coil resistance.
- To assess the measurement bias introduced by common two-wire configurations.
- To compare coil resistance between different ENDS products.
Main Methods:
- Development of a specialized apparatus mimicking ENDS reservoir, coil, and power control assembly.
- Demonstration of the method on two popular ENDS devices: ALTO by Vuse and JUUL.
- Comparison of two-wire and four-wire resistance measurement configurations.
Main Results:
- The proposed method demonstrated stability and reliability.
- The two-wire configuration exhibited a significant positive bias of 0.086 Ω.
- A substantial coil resistance difference of 0.593 Ω (p < 0.001) was found between ALTO and JUUL.
- Mean coil resistance: ALTO 1.031 (0.067) Ω, JUUL 1.624 (0.033) Ω.
Conclusions:
- The four-wire configuration is recommended for universal adoption due to its reduced bias.
- Variations in coil resistance within and between ENDS products can significantly impact aerosol emissions.
- Standardized, accurate resistance measurement is vital for reproducible ENDS research and regulatory assessment.
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